#分支


#申明一个变量

bl = True


#书写表达式

if bl == True:
    print('TTTTTTTTTTT')
    print('TTTTTTTTTT')
else:
    print('FFFFFFFFFFFF')



#-------------------------------------------------

bl = 6
if bl==1:
    print(1)
elif bl==2:
    print(2)
elif bl==3:
    print(3)
else:
    print('<javascript>alert("666")</javascript>')   #JS无效



#-------------------------------------------------
#潮状分支
a = 3;
b =2
if a ==3:
    print('3是对的')
    if b==1:
        print('b为1也是对的')
    else:
        print('b不为1')
        if isinstance(b,int):
            print("b是整型")
        else:
            print("b不是整型")
else:
    print('3是不对的')
